SEE SL3

South East England Secondary Line contract 3 (SEE SL3) appears to have been a joint contract for secondary lines within the SEE region. The contract was divided up into:

• SEE SL3(a) on towers designed by Milliken Brothers, believed to be Milliken E102, unusual due to a tendency for the SEE region to not use Milliken towers
• SEE SL3(b) on towers designed by Watshams, derived from the slightly-older SEE SL2 towers

Research conducted by Tom Gloag has brought this all to light.